56 Journal of Comparative Neurology. 



PLATE IX. 



Fig. 40. Section of the skin of the head of a toad (Bufo) after intra vitam 

 injection with methylene blue and fixation with Bethe's solution of molybdate 

 of ammonia. Examined in glycerine. The section is somewhat oblique so 

 that the duct and part of the body of the gland is removed. The delicate non- 

 medulated fibers are seen generously distributed over the uncut surface of the 

 gland. Coarser fibers are also seen in the lower and upper plexuses, also a bun- 

 dle of sensory rods at the left. 



Fig. 41. Intra vitam methylene blue preparation of skin of axolotl, show- 

 ing connection of cells of the ganglionic meshwork beneath the corium with 

 the epidermis, a, fiber passing to cells of the intracellular reticulum; b, non-med- 

 ullated fibers from a nerve piercing the corium; c, c^ c- and ^, ganglion cells of 

 the plexus beneath the corium. 



